Event bosses narrowly avoided a potential run-in after realising the pair were set to come face-to-face backstage during rehearsals at London’s O2 Arena next week.

The initial plan would have seen One Direction, Taylor, Muse and Justin Timberlake take to the stage for their dry-run on Tuesday, but 1D have now swapped with Mumford & Sons in a bid to dodge any awkwardness.

A source revealed: ‘It was a bit of an oversight to say the least. The original plans were drawn up a while back when Harry and Taylor bumping into each other wouldn’t have been an issue.

‘But they’ve had to have a bit of a rethink now. Mumford & Sons were meant to be rehearsing on the Monday with Robbie Williams, Emeli Sande and Ben Howard – but they were happy to switch.

Haylor split at the start of last month after just a few weeks together (Picture: Splash)

‘It could have caused a bit of a headache if the Mumfords kicked off — but fortunately they played ball,’ the insider added to The Sun.

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Harry, 19, and his bandmates Liam Payne, Zayn Malik, Niall Horan and Louis Tomlinson will take centre stage at the hotly anticipated event on Wednesday night, where they will perfrom their Comic Relief single One Way Or Another.

The Kiss You hitmakers are up for best British group while 23-year-old Swift has been nominated for international female solo artist.

The Love Story songbird will presumably belt out her heartbreak hits We Are Never Ever Getting Back Together and I Knew You Were Trouble while Harry cowers backstage.